0   1   0
0   3   0
1   4   0
2   0   0
2   3   0
2   8   0
2   10  0
3   1   0
3   8   0
4   5   0
5   3   0
5   4   0
6   4   0
6   7   0
7   4   0
7   5   0
8   2   0
9   5   0
9   10  0
9   11  0
10  2   0
10  9   0
10  11  0
11  12  0
12  7   0